DC871A-A

DC871A-A demonstration circuit features the LTC3215EDD 700mA low noise high current LED charge pump. This board can be powered from single lithium-ion battery input voltage range of 2.9V to 4.4V or three AAA batteries in series. The lithium-ion battery input voltage range, high LED flash current and separate torch mode current setting, internal charge pump switches, inductor less solution, minimal external components, and simple design make the LTC3215 the top solution for space-constrained cellular telephone camera flash solutions. The LTC3215 is very similar to the LTC3216, but with two less pins and a slightly lower maximum flash current of 700mA as opposed to 1000mA.

• LED: AOT 2015 HPW 1751B
• 125mA torch current
• 320mA flash current
• R1: 31.6kohm, 1% and R2: 20.5kohm, 1%